The basic position of man in rebellion against God is that man is at the center of the universe, that he is autonomous -- here lies his rebellion. Man will keep his rationalism and his rebellion, his insistence on total autonomy or partially autonomous areas, even if it means he must give up his rationality.
(Francis A. Schaeffer, Escape From Reason, Ch. 3)
Modern man says, "No, we are just machines -- chemically determined or psychologically determined." But nobody consistently lives this way in his life. I would insist that here is a presupposition which intellectually, in the laboratory, would be cast out simply because it does not explain what is.
(Francis A. Schaeffer, The Church at the End of the Twentieth Century, Ch. 1)
"100 per cent of us die, and the percentage cannot be increased."
--CS Lewis
"Whenever you find a man who says he doesn't believe in a real Right and Wrong, you will find the same man going back on this a moment later."
--CS Lewis